Table 6 Influence of interfering cations and anions on recovery percentage, R (%), of 10 μg ml–1 of each heavy metal ions using DiGu.MC. conditions: 0.4 g l–1 DiGu.MC, stirring time 60 min, pH 6 at 25 °C
Interfering ions | Concen (μg ml–1) | % Removal | |||
|---|---|---|---|---|---|
Cu2+ | Hg2+ | Pb2+ | Cd2+ | ||
Mg2+ | 50 | 99.4 | 99.1 | 99.4 | 77.6 |
Fe2+ | 50 | 98.1 | 98.2 | 97.4 | 75.6 |
Ca2+ | 50 | 100 | 100 | 99.7 | 77.6 |
Al3+ | 50 | 97.7 | 94.2 | 98.2 | 74.7 |
\({\text{PO}}_{4}^{3 - }\) | 50 | 98.6 | 98.4 | 99.1 | 76.5 |
Acetate | 50 | 97.1 | 98.4 | 96.2 | 76.1 |
Oxalate | 50 | 98.4 | 98.2 | 98.4 | 73.2 |
Edetate | 50 | 96.2 | 97.1 | 96.1 | 72.6 |